[tdwg-content] Treatise on Occurrence, tokens, and basisOfRecord [SEC=UNCLASSIFIED]

[joel sachs]

Hi Roger -

On Thu, 28 Oct 2010, Roger Hyam wrote:

> What exactly is an individual? A flock? A herd? A breading pair? A colony? A clonal stand?


I thought that Rich convinced everyone that a DwC:individual can be any 
of those things.

> And of course the individual that was not there - the absence!

Absence assertions are a good example of something discussed earlier - 
that occurrence records can be both raw data, and also the output of 
analysis. It seems that one typical (or at least proper) workflow would be 
to
i) infer the absence of a taxon in an area from an absence of occurrence 
records together with an event record with an appropriate value for 
samplingEffort.
ii) assert the absence, via an occurrence record w. occurrenceStatus="absent". 
(Of course, there are cleaner ways to assert absence.)

Joel.



>
> :)
>
> Roger





>
>
> On 28 Oct 2010, at 17:19, Hilmar Lapp wrote:
>
>>
>> On Oct 28, 2010, at 11:58 AM, joel sachs wrote:
>>
>>> "An occurrence is a tuple consiting of time, place, individual, and
>>> some optional properties."
>>>
>>> What's that lacking?
>>
>>
>> Nothing in my mind. I missed that definition (was it yours?) :-) - so
>> much stuff flying by left and right
>>
>> 	-hilmar
>> --
>> ===========================================================
>> : Hilmar Lapp  -:- Durham, NC -:- informatics.nescent.org :
>> ===========================================================
>>
>>
>>
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>